JPS6043550A - Screw bonding piece for implanted metal fitting having cylindrical shell embedded in concrete complete material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a threaded connection piece with a threaded rod that can be screwed into a threaded cylindrical shell, which is adapted to a stud with a threaded cylindrical shell that is embedded in a concrete composite. .

A stud with a threaded cylindrical shell, which is embedded in the concrete fillet, is used to access the concrete filler to a rolling machine during transport and handling at the construction site. .

In order to connect it to the winding truss, a type I screw-in connection piece as described above is known (as described in the West German Patent Publication).
1913912), this connecting piece consists of a loop of rope connected to a threaded rod. A hook attached to the rope or chain of the dresser is hooked into the loop of this rope.

Already in manufacturing plants, the completed concrete must be installed on the rolling rock many times at very large intervals. For this purpose, in most cases, the connecting piece, for example with a rope ring, must be screwed in anew and removed again each time, but this requires relatively high labor costs. Furthermore, there is a risk that the internal thread of the threaded cylindrical shell will be contaminated.

In order to avoid the above-mentioned disadvantages, it is proposed that the connecting piece with the rope ring remains inserted into the implant with the cylindrical shell, at least in the manufacturing plant and in temporary intermediate storage. . However, in this case a relatively large number of such connecting pieces are required. Furthermore, in this type of joint piece, the rope ring is compressed and fixed on the threaded rod, so it is not suitable to pull it in an oblique direction. must be taken into consideration.

In addition to the heads of implants with rope rings, heads with improved properties are known (German Patent Application No. 3009'789) whose properties are improved so that they can be pulled diagonally. However, even in that case, it is necessary to reduce the load when pulling diagonally. This is because in this case too, the force is applied exclusively via the threaded bolt.

Furthermore, transport fittings are known (German Patent No. 16 842'78), which can be connected to implanted fittings even faster and more easily than by screwing. This transportation bracket uses claws to grasp the enlarged head attached to the bracket embedded in the concrete from behind (West German Utility Model No. 1820718
Publication No. 5). Installing and removing the carrying hardware multiple times does not waste manpower. Therefore, a relatively small number of transport fittings are sufficient within the manufacturing plant. Moreover, such a carrying fitting allows for diagonal tensioning without significantly reducing the carrying force. This is because the carrying hardware is laterally supported by the walls of a recess provided in the finished concrete material. Contrary to the above-mentioned transport studs with spherical heads embedded in the concrete, which have four large parts, the studs with cylindrical shells are suitable for use with thin plates and thin preforms of steel and concrete. There is also a strong point that you can add some finesse to it.

The purpose of the present invention is to take the state of the art mentioned at the beginning as a starting point,
The use of a stud with a cylindrical shell, embedded in the concrete, makes it possible to quickly and easily connect the carrying fittings and at the same time ensures that the carrying force is not reduced even when tensioned at an angle. , to create a threaded connection piece.

The above object is achieved according to the invention in a screw connection piece of the type mentioned at the outset in the following manner. That is, the threaded rod protrudes from the underside of the support plate, surrounds the threaded rod concentrically, and is disposed orthogonally to at least one support surface capable of being supported by the concrete composite; This is achieved by providing a recessed part on the upper side of the plate, and in this recessed part a metal fitting connection piece that can be connected to a transporting metal fitting is arranged.

The screw-in connection piece is screwed in only once during multiple conveying operations and during the time between conveying operations, so that the labor costs for this are low. The use of a transporting fitting that can be connected to the fitting connecting piece by simply hooking it, while retaining the advantage of the small volume occupied by a fitting with a cylindrical shell embedded in concrete. It is now possible to do so. For example, when the metal fitting connecting piece is formed as a rod with an enlarged head, a transportation metal fitting is used in which the enlarged head is clawed from behind; When formed as a plate with holes, a hook-shaped carrying fitting is used, which is again quickly and easily installed and removed.

The comparatively large diagonal conveying forces, which are obtained by lateral support of the conveying fitting in the sunken part of the support plate, are also reduced by the use of threaded coupling pieces on implant fittings with a threaded cylindrical shell. Many. This is because this connecting piece is subjected to almost no bending forces. The moment generated by the diagonal tension is due to the tension force acting in the longitudinal direction of the cylindrical shell stud and the supporting surface and the concrete surface acting at a distance and parallel to this force. It is accommodated as a pressure between.

Since the threaded connection piece has a relatively simple construction and can be produced in particular as a one-piece turned part, its manufacturing costs are low, so that the connection piece does not require large expenditures. It is possible to prepare a large number of items without having to do so. Since this threaded connection piece is not removed from the implant during the multiple transport steps and during intermediate storage, there is no risk of contamination of the threaded cylindrical shell.

In an advantageous development of the idea of the invention, the outer ring-shaped bearing surface is arranged in the opposite direction to the threaded rod with respect to the inner bearing surface, which is arranged parallel and pivoted to the bearing surface. It may be misplaced in the axial direction. If the stud with a cylindrical shell is sunk against the surface of the concrete deck, the outer bearing surface rests against the surface of the concrete deck. This embodiment is also used when a stud with a cylindrical shell embedded in the concrete is arranged flush with the finished concrete material. In this case, the inner supporting surface is thus supported on the surface of the concrete concrete material adjoining the threaded cylindrical shell.

The screw-in connection piece according to the invention is an adapter that makes it possible to connect an implantation fitting with a cylindrical shell, which is particularly simple in construction, and a transport fitting, which is not J/'i compatible, but which is particularly easy to install. It is. It is known in practice that a connecting piece with a hook or ring is screwed into a stud with an external thread and embedded in concrete (West German Utility Model Application No. 81O).

However, in this case, support when the concrete is pulled diagonally is provided by a conical surface provided on the finished concrete material, and this conical surface is subjected to a relatively large load.

If manufacturing accuracy is poor, the ends of stud bolts embedded in concrete will be subject to bending forces.

The invention will be explained in more detail in the following description by means of embodiments illustrated in the accompanying drawings.

The threaded connection piece 1 shown in Figures 1 to 3 is connected to the support plate 2.
A threaded rod 3 protrudes from the underside of this support plate. The threaded rod 3 can be screwed into the inner thread of a threaded cylindrical shell 4 (see Figure 3), which threaded circle is a stud 6 with a cylindrical shell embedded in the concrete fillet 5. In this embodiment, the stud is a stud with ribs.

As shown in Figure 3, the implant 6 having a cylindrical shell is placed in a sunken position with respect to the surface 7 of the concrete. The support plate 2 has on its lower side a ring-shaped support surface 8 located on the outside and a ring-shaped support surface 9 arranged concentrically on this support surface, these support surfaces having a conical surface. 1
They are interconnected by 0. The outer bearing surface 8 is axially displaced relative to the inner bearing surface in the direction opposite to the threaded rod 3. The part of the support plate 2 delimited by the inner support surface 9 protrudes in the screwed state into a recessed part 11 of the concrete surface 7 surrounding the threaded cylindrical shell 4, while the unilateral support surface 8 is in the concrete It is supported by the surface of the body.

The upper surface of the support plate 2 has a recess 1 formed as a spherical cutout surface.
2 is provided, and in the center of this recess a metal connection piece 13 is arranged, which in the embodiment shown in FIGS. 11 to 3 is a shaft 14 with an enlarged head 15. The head 15 is grasped from behind like a claw by a carrying metal fitting 16 (Fig. 3), and the finished concrete material 5 is lifted.

When stretched, the carrying fitting 16, which has a spherical outer surface, comes into contact with the side wall of the recess 12.

The carrying hardware 16 is rotatable in all directions relative to the coupling piece 1 and can thus accommodate forces from any direction.

The embodiment shown in Figure 4 differs from the embodiment shown in Figure 3 only in the following respects. That is, in the recess 12 of the support plate 2, a plate 1'7 is provided as a metal connection piece, which is arranged perpendicularly to the support plate 2 and has a hole 18 in the lateral direction. It is possible to hook the transportation fitting 19 of the.

[Brief explanation of the drawing]

Figure 1 is a threaded joint piece shown in an axial sectional view, Figure 2 is a plan view of the joint piece in Figure 1 seen in the direction of the arrow ■, Figure 3 is shown in Figures 1 and 2. Figure 4 shows the state in which the connecting piece has been screwed in and the transportation fitting is attached to this connecting piece. The embodiment of the connecting piece ``Man 1'' is shown using the same expression as in Figure 3, and in this embodiment, the metal fitting connecting piece is a plate with a hole facing in the horizontal direction, and the hook is pulled into this hole. It is something that can be multiplied. In the figure (Hate?...Support plate, 3...Threaded rod, 4...Threaded cylindrical shell, 5...Completed concrete material, 6...Socket fitting with cylindrical shell, 8)
Or 9...Supporting surface, l&...Recessed portion, 13 or 17...Metal fitting connection piece, 14...Its. 15... Enlarged head, 18... Lateral direction. Agent: Mitsuhiro Ezaki Mitsufumi Ezaki Continued from page 1 0 Inventor: Ernst Hatt Federal Republic of Germany, 1 Inventor Etzkart Laing 19 Hohe, Federal Republic of Germany Darmstadt, Schilbachweh

Claims (1)

Claims: l) adapted to a stud (6) with a threaded cylindrical shell (4) embedded in a concrete fillet (5);
Threaded rod (3) that can be screwed into a threaded cylindrical shell (4)
In a threaded connection piece having a threaded connection piece, the threaded rod (3) projects from the underside of the support plate (2) and encircles the threaded rod (3) concentrically, and is capable of being supported in the concrete filler, at least one The supporting surfaces (8 or 9) are arranged so as to be perpendicular to each other, and a recessed portion (12) is provided on the upper side of the supporting plate (2). Metal fitting connecting piece (13 or l) that can be combined with metal fittings
'7) is arranged. 2) The outer ring-shaped support surface (8) is arranged parallel to and concentrically with the inner support surface (9).
) is axially displaced in the opposite direction to the threaded rod (3). 3) The screw connection piece according to claim 1 or 2, characterized in that the upper recessed portion (12) of the support plate (2) is a spherical cutout. 4) Any of claims 1-1 to 3, characterized in that the metal connection piece (13) has a shaft (14) and an enlarged head (15) 5) The metal fitting connecting piece (13) is arranged perpendicularly to the support plate (2) and has a horizontal hole (18).
), The screw-in connection piece according to any one of claims 1 to 3.